An image contrasted sharply, using a backlight) of a helicopter rotor, main element for the support of this type of aircraft.
In helicopters, the main rotor provides both strength lift like push, while providing the tail rotor thrust to compensate par motorgenerating the main rotor.(W)
The image can be used as Wallpaper, being available in high resolution by clicking the mouse on the center image (4128 x 3096)
You can see here the same image of the rotor (no backlight) a helicopter belonging to Department of V..ehicle Aerospaciales (DVA).
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